﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace DAL
{
    using DAL.Entities;

    public class HocviDAL : BaseDAL, UTL.IBaseDAL 
    {
        public int Count()
        {
            throw new NotImplementedException();
        }

        public DataTable Select()
        {
            string sql = @" SELECT * FROM hocvi";
            return ExecuteQuery(sql);
        }

        public DataTable Select(object obj)
        {
            throw new NotImplementedException();
        }

        public object GetByKey(object key)
        {
            throw new NotImplementedException();
        }

        public bool Delete(string id)
        {
            string sql = @"DELETE FROM hocvi WHERE mahv = '{0}'";
            sql = string.Format(sql,id);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public bool Insert(object obj)
        {
            var o = (hocvi)obj;
            string sql = @"INSERT INTO hocvi(mahv,tenhv) VALUES('{0}',N'{1}')";
            sql = string.Format(sql,o.mahv,o.tenhv);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public bool Update(object obj)
        {
            var o = (hocvi)obj;
            string sql = @"UPDATE hocvi SET tenhv='{0}' where mahv='{1}'";
            sql = string.Format(sql,o.tenhv,o.mahv);
            return ExecuteNonQuery(sql) > 0 ? true : false;
        }

        public DataTable Search(string name)
        {
            throw new NotImplementedException();
        }

        public string  Select_max()
        {
            string sql = @"SELECT max(substring(mahv,3,LEN(mahv)-2)) as id FROM hocvi";

            DataTable dt = ExecuteQuery(sql);
            return dt.Rows.Count > 0 ? dt.Rows[0]["id"] + "" : "0";
           
        }



        public bool deleteobj(object obj)
        {
            throw new NotImplementedException();
        }
    }
}
